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E90/E91/E92/E93 (2006 - 2013)
The E9X is the 4th evolution of the BMW 3 series including a highly tuned twin turbo 335i variant pushing out 300hp and 300 ft. lbs. of torque. BMW continues to show that it sets the bar for true driving performance! -- View the E9X Wiki

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  #1  
Old 08-25-2012, 11:17 AM
triplrocks triplrocks is offline
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Mein Auto: 2007 328XI
K&n filters

I have a 2007 328xi, will a k&n drop in filter increase hp or mpg? Do you think they are worth it?
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  #2  
Old 08-25-2012, 12:18 PM
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floydarogers floydarogers is offline
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Location: Renton, WA
 
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Quote:
Originally Posted by triplrocks View Post
I have a 2007 328xi, will a k&n drop in filter increase hp or mpg? Do you think they are worth it?
No.
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Old 08-25-2012, 12:26 PM
Tom K. Tom K. is offline
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K&N air filters were great for my 1976 BMW R75/6 mortorcycle - but I don't think our modern Bimmers still use lean running carburetors!

Listen to Floyd and save your money.

Tom
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Old 08-25-2012, 01:14 PM
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TJPark01 TJPark01 is offline
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does nothing.
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Old 08-25-2012, 01:31 PM
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MMME30W MMME30W is offline
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Originally Posted by triplrocks View Post
I have a 2007 328xi, will a k&n drop in filter increase hp or mpg? Do you think they are worth it?
No.

But it may screw up your mass air flow sensor if you over oil it.
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  #6  
Old 08-25-2012, 03:44 PM
Haley Haley is offline
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Stay away from them. Don't even attempt it. They will clog up motor. Bad
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